Economic Impact of Parasitism in Dairy Herds

Authors

  • A. C. Todd Department of Veterinary Science, University of Wisconsin, Madison, Wisconsin 53706
  • D. H. Bliss Department of Veterinary Science, University of Wisconsin, Madison, Wisconsin 53706
  • J. W. Crowley, Jr. Department of Veterinary Science, University of Wisconsin, Madison, Wisconsin 53706
  • L. Grisi Department of Veterinary Science, University of Wisconsin, Madison, Wisconsin 53706

Keywords:

internal parasite control, deworming, subclinical parasitisms, economic

Abstract

This paper is concerned with internal parasite control for dairy herds based on the systematic deworming programs which were developed from studies made in DHI herds in Wisconsin and three other dairy states.

Dairy cows in most herds have subclinical parasitisms and it is generally advantageous that they be treated for worms when they freshen, and again 60-90 days later; they produce more milk. There is economic advantage when cows are dewormed a third time in a lactation, at 120-150 days, but not as much as when they are treated early in lactation.

Cover image of the Proceedings of the 10th Annual Convention: Cover image is a photo of the Gateway Arch taken at sunset in hues of orange. Conference information is written on top of the image and the conference theme is written at the bottom of the page.

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Published

1977-12-12

Issue

1977

Section

Dairy Sessions